Number of n X n 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.
A223832
Number of n X n 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =48a(4) =249a(5) =1240a(6) =5992a(7) =28369a(8) =132427a(9) =611901a(10) =2805670a(11) =12786249a(12) =57979474a(13) =261797013a(14) =1177774158a(15) =5281497918
External references
- oeis: A223832